I got my X-Mystique card in today. The manual was in Korean, but I didn't need it. Installed the card in my htpc, cancelled out of WinXP installer and ran the included CD.
After a quick reboot, I configured it for DD5.1 encoding (one button to press to accomplish this). The program runs in your systray, so it's easy to get to. It allows you to choose DD5.1 encoding, 48khz, 44.1khz, and 96khz PCM out.
I disabled AC3Filter and played a couple of WMV-HD files in WMP, TT2.0, and MPC. Everytime I got glorious DD5.1. I also checked Task Manager to see if any other programs were taking up CPU cycles during playback, and nothing else was, so I'm assuming this is true hardware encoding.
Next I fired up HL2 and set it to 5.1 speaker setup. It worked. I intentionally knocked things over to see if it was encoding to the rears correctly, and it was.
I then played a couple of dvds in TT2.0 with both DD5.1 and DTS tracks, the card passed-through the data fine.
The only thing it failed to do was play a DTS-CD (just got static), in WMP and MPC. I even tried setting it to 44.1khz PCM and still got static. With my replaced Audigy2 NX, I could only get a DTS-CD to play fine with the software that came with it, so maybe there could be software written for this card to allow it also.
If anyone has any questions, feel free to ask. Also, they shipped this from Korea on Monday and it actually got here yesterday, I just wasn't around to sign for it. (4 days from Korea to the U.S. is pretty good, IMO).
Currently testing 3D with Sammy DLP, shutter glasses, and HTPC